JPAQuery

Create a database hierarchy using simple command.

[How to use it]

import static com.huskycode.jpaquery.command.CommandNodeFactory.n;
import static com.huskycode.jpaquery.command.CommandNodesFactory.ns;

@Autowired EntityManager entityManager;

DependenciesDefinition definition = new DepsBuilder()
					    			.withLink(Link.from(Descendant.class, Descendant_.parentId)
					    						.to(Parent.class, Parent_.parentId))
					    					...
					    			.withLink(Link.from(Parent.class, Parent_.ancestorId)
					    						.to(Ancestor.class, Ancestor_.ancestorId))	
					    					...		
					    			.build();

context = JPAQueryContext.newInstance(entityManager, definition);
	
CommandNodes commands = ns(n(Ancestor.class).withValue(Ancestor_.status, "active")
								with(n(Descendant.class).withValue(Descendant_.status, "cancelled"),
									 n(Descendant.class).withValue(Descendant_.status, "unknown")));
PersistedResult result = context.create(commands);

[What is created on Database]
Root
- ....
	-...
	    Ancestor("active")
	        - .... >> Random value for things in between such as Parent.class
	           - ...
	              - Descendant(status="cancelled")
	              - Descendant(status="unknown")

[How to retrieve it]
ancestor = result.getForClassByCommandIndex(Ancestor.class,0)
cancelledDescendant = result.getForClassByCommandIndex(Descendant.class, 0)
unknownDescendant = result.getForClassByCommandIndex(Descendant.class, 1)